Weather Records on 20 May 1964

517 weather records were set or tied worldwide on 20 May 1964. Highest significance: Hakalau 142, US.

Key Facts for 20 May 1964

On 20 May 1964, 517 weather records were set or tied at long-record stations worldwide.
343 were record highs and 48 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 13 monthly and 504 daily.
Hakalau 142 set a daily record precipitation of 85.9 mm (3.4 in) on 20 May 1964.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 455 records.

Record Map

517 stations

517 station records on 20 May 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hakalau 142	United States	Record daily precipitation	85.9 mm (3.4 in)	59 of 100 (Notable)
Babinda Post Office	Australia	Record daily precipitation	149.4 mm (5.9 in)	58 of 100 (Notable)
Saidpur Bhitari	India	Record daily precipitation	45.7 mm (1.8 in)	56 of 100 (Notable)
Pecs Pogany	Hungary	Record daily precipitation	35.5 mm (1.4 in)	55 of 100 (Notable)
Honohina 137	United States	Record daily precipitation	105.9 mm (4.2 in)	54 of 100 (Notable)
Kuranda Railway Station	Australia	Record daily precipitation	57.4 mm (2.3 in)	52 of 100 (Notable)
Rio Grande City	United States	Record daily precipitation	114.8 mm (4.5 in)	52 of 100 (Notable)
Cooktown Post Office	Australia	Record daily precipitation	78.7 mm (3.1 in)	49 of 100 (Notable)
Lake Konomoc	United States	Record daily precipitation	58.9 mm (2.3 in)	48 of 100 (Notable)
Paauhau 217	United States	Record daily precipitation	72.9 mm (2.9 in)	47 of 100 (Notable)
Mysore	India	Record daily precipitation	83.9 mm (3.3 in)	46 of 100 (Notable)
South Johnstone Post Office	Australia	Record daily precipitation	113.8 mm (4.5 in)	45 of 100 (Notable)
Florania	Brazil	Record daily precipitation	49.6 mm (2.0 in)	45 of 100 (Notable)
Haina 214	United States	Record daily precipitation	75.7 mm (3.0 in)	45 of 100 (Notable)
Deeral	Australia	Record daily precipitation	115.6 mm (4.6 in)	43 of 100 (Notable)
Gadgarra Forest Reserve	Australia	Record daily precipitation	42.7 mm (1.7 in)	43 of 100 (Notable)
Innisfail	Australia	Record daily precipitation	97.8 mm (3.9 in)	43 of 100 (Notable)
South Johnstone Exp STN	Australia	Record daily precipitation	104.1 mm (4.1 in)	42 of 100 (Notable)
Jena Sternwarte	Germany	Record daily precipitation	26.0 mm (1.0 in)	41 of 100 (Notable)
Bernburg/Saale (Nord)	Germany	Record daily precipitation	39.0 mm (1.5 in)	41 of 100 (Notable)
Nerchinskij Zavod	Russia	Record daily precipitation	44.2 mm (1.7 in)	40 of 100 (Notable)
Kukuihaele Mill 206	United States	Record daily precipitation	63.5 mm (2.5 in)	40 of 100 (Notable)
Honokane 181.1	United States	Record daily precipitation	125.2 mm (4.9 in)	39 of 100 (Notable)
Low Isles Lighthouse	Australia	Record daily precipitation	36.8 mm (1.4 in)	38 of 100 (Notable)
Zinapecuaro	Mexico	Record daily precipitation	28.4 mm (1.1 in)	38 of 100 (Notable)
Katiya	India	Record daily precipitation	84.2 mm (3.3 in)	37 of 100 (Notable)
Port Douglas - Warner St	Australia	Record daily precipitation	40.1 mm (1.6 in)	36 of 100 (Notable)
Osijek	Croatia	Record daily precipitation	36.4 mm (1.4 in)	36 of 100 (Notable)
Jonacatepec	Mexico	Record daily precipitation	26.9 mm (1.1 in)	36 of 100 (Notable)
Paauilo 221	United States	Record daily precipitation	93.2 mm (3.7 in)	35 of 100 (Notable)
Goondi Mill Csr	Australia	Record daily precipitation	129.5 mm (5.1 in)	34 of 100 (Routine)
Kyelong Obsy	India	Record daily precipitation	26.2 mm (1.0 in)	34 of 100 (Routine)
Snowflake	United States	Record high minimum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Williston Sloulin Fld	United States	Record high maximum temperature	36.7 C (98.1 F)	33 of 100 (Routine)
Qu'appelle	Canada	Record high maximum temperature	32.8 C (91.0 F)	32 of 100 (Routine)
Weimar	Germany	Record daily precipitation	37.3 mm (1.5 in)	32 of 100 (Routine)
Bansdih	India	Record daily precipitation	33.0 mm (1.3 in)	32 of 100 (Routine)
Somerville 4 NW	United States	Record high minimum temperature	18.3 C (64.9 F)	32 of 100 (Routine)
Honomu Mauka 138	United States	Record daily precipitation	128.3 mm (5.1 in)	32 of 100 (Routine)
Moosehead	United States	Record daily precipitation	26.4 mm (1.0 in)	31 of 100 (Routine)
Mohall	United States	Record high maximum temperature	35.0 C (95.0 F)	31 of 100 (Routine)
Yarrabah Comm Council	Australia	Record daily precipitation	127.0 mm (5.0 in)	30 of 100 (Routine)
Nova Olinda (Andreza)	Brazil	Record daily precipitation	61.0 mm (2.4 in)	30 of 100 (Routine)
Carson City	United States	Record high minimum temperature	13.3 C (55.9 F)	30 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	32.8 C (91.0 F)	30 of 100 (Routine)
Kukaiau 222	United States	Record daily precipitation	104.4 mm (4.1 in)	30 of 100 (Routine)
Zagreb-Gric	Croatia	Record daily precipitation	27.6 mm (1.1 in)	29 of 100 (Routine)
Olathe 3E	United States	Record high maximum temperature	33.3 C (91.9 F)	29 of 100 (Routine)
Waverly	United States	Record high minimum temperature	17.8 C (64.0 F)	28 of 100 (Routine)
Landsburg	United States	Record daily precipitation	37.8 mm (1.5 in)	28 of 100 (Routine)
Victoria Gonzales Hts	Canada	Record low maximum temperature	10.6 C (51.1 F)	27 of 100 (Routine)
Quatsino	Canada	Record low maximum temperature	9.4 C (48.9 F)	27 of 100 (Routine)
Grenfell	Canada	Record high minimum temperature	15.6 C (60.1 F)	27 of 100 (Routine)
Indian Head Cda	Canada	Record high minimum temperature	13.9 C (57.0 F)	27 of 100 (Routine)
Regina Int'l A	Canada	Record high maximum temperature	34.4 C (93.9 F)	27 of 100 (Routine)
Manoharpur	India	Record daily precipitation	35.0 mm (1.4 in)	27 of 100 (Routine)
Atlatlahuacan	Mexico	Record daily precipitation	29.0 mm (1.1 in)	27 of 100 (Routine)
Belle Isle	Canada	Record daily snowfall	7.6 cm (3.0 in)	26 of 100 (Routine)
Artern	Germany	Record daily precipitation	29.6 mm (1.2 in)	26 of 100 (Routine)
Tucson WFO	United States	Record high maximum temperature	39.4 C (102.9 F)	26 of 100 (Routine)

Counts by Type and Timescale

517 records

Records set or tied on 20 May 1964 by type: Highest daily maximum 223, Lowest daily maximum 36, Highest daily minimum 120, Lowest daily minimum 12, Heaviest daily rainfall 122, Heaviest daily snowfall 4.

Records on 20 May 1964 by type
Record type	Records
Highest daily maximum	223
Lowest daily maximum	36
Highest daily minimum	120
Lowest daily minimum	12
Heaviest daily rainfall	122
Heaviest daily snowfall	4
Deepest snow cover	0

Records on 20 May 1964 by timescale: all-time 0, monthly 13, daily 504.

How Much Records Were Beaten By

386 broken records

Margins by which the 386 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 114.6. Ties are not counted.

Top 20 by Significance

20 May 1964

Top 20 records on 20 May 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1964	Hakalau 142, US	daily rain	85.9 mm (3.4 in)	52.9 mm (2.1 in)	54 years	59 of 100 (Notable)
20 May 1964	Babinda Post Office, AU	daily rain	149.4 mm (5.9 in)	114.6 mm (4.5 in)	45 years	58 of 100 (Notable)
20 May 1964	Saidpur Bhitari, IN	daily rain	45.7 mm (1.8 in)	45.7 mm (1.8 in)	63 years	56 of 100 (Notable)
20 May 1964	Pecs Pogany, HU	daily rain	35.5 mm (1.4 in)	21.0 mm (0.8 in)	57 years	55 of 100 (Notable)
20 May 1964	Honohina 137, US	daily rain	105.9 mm (4.2 in)	71.1 mm (2.8 in)	28 years	54 of 100 (Notable)
20 May 1964	Kuranda Railway Station, AU	daily rain	57.4 mm (2.3 in)	45.2 mm (1.8 in)	52 years	52 of 100 (Notable)
20 May 1964	Rio Grande City, US	daily rain	114.8 mm (4.5 in)	88.9 mm (3.5 in)	17 years	52 of 100 (Notable)
20 May 1964	Cooktown Post Office, AU	daily rain	78.7 mm (3.1 in)	65.2 mm (2.6 in)	5 years	49 of 100 (Notable)
20 May 1964	Lake Konomoc, US	daily rain	58.9 mm (2.3 in)	37.6 mm (1.5 in)	35 years	48 of 100 (Notable)
20 May 1964	Paauhau 217, US	daily rain	72.9 mm (2.9 in)	56.1 mm (2.2 in)	26 years	47 of 100 (Notable)
20 May 1964	Mysore, IN	daily rain	83.9 mm (3.3 in)	43.3 mm (1.7 in)	53 years	46 of 100 (Notable)
20 May 1964	South Johnstone Post Office, AU	daily rain	113.8 mm (4.5 in)	90.2 mm (3.6 in)	7 years	45 of 100 (Notable)
20 May 1964	Florania, BR	daily rain	49.6 mm (2.0 in)	44.6 mm (1.8 in)	15 years	45 of 100 (Notable)
20 May 1964	Haina 214, US	daily rain	75.7 mm (3.0 in)	53.3 mm (2.1 in)	10 years	45 of 100 (Notable)
20 May 1964	Deeral, AU	daily rain	115.6 mm (4.6 in)	94.5 mm (3.7 in)	1 year	43 of 100 (Notable)
20 May 1964	Gadgarra Forest Reserve, AU	daily rain	42.7 mm (1.7 in)	25.4 mm (1.0 in)	30 years	43 of 100 (Notable)
20 May 1964	Innisfail, AU	daily rain	97.8 mm (3.9 in)	47.0 mm (1.9 in)	59 years	43 of 100 (Notable)
20 May 1964	South Johnstone Exp STN, AU	daily rain	104.1 mm (4.1 in)	51.0 mm (2.0 in)	36 years	42 of 100 (Notable)
20 May 1964	Jena Sternwarte, DE	daily rain	26.0 mm (1.0 in)	1.1 mm (0.04 in)	111 years	41 of 100 (Notable)
20 May 1964	Bernburg/Saale (Nord), DE	monthly rain	39.0 mm (1.5 in)	8.9 mm (0.35 in)	24 years	41 of 100 (Notable)

Significance is a score from 0 to 100 combining margin, the age of the old record and the length of the station's record. How it is computed.

The Same Date in Other Years

1802 to 1964

Records set or tied on this calendar date in each year from 1802 to 1964. 1964 had 517 records.

Counts for years before the ledger starts come from the same station rules.

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 1964-05-20: CSV or JSON. Field meanings are on the data page.

Sources: Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Made with Natural Earth. Public domain map data. Borders are Natural Earth's de facto depiction. Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	349
20 to 40	16
40 to 60	14
60 to 80	3
80 to 100	3
100 to 120	1